# Eighty One vs Math Lessons by Voice

The clearest difference is in-app purchases: Eighty One at none against Math Lessons by Voice's 1. Eighty One also leads on iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Math Lessons by Voice sells 1 one-off in-app purchase. Eighty One asks for nothing beyond the download.

## The numbers

| Metric | Eighty One | Math Lessons by Voice |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 11 MB | 4 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Danilov](https://appshunter.io/developer/1767583011) | [Aishat Perez](https://appshunter.io/developer/1836701734) |

## What reviewers say

### Eighty One

[App page](https://appshunter.io/ios/app/eighty-one/id6670788394)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Lessons by Voice

[App page](https://appshunter.io/ios/app/math-lessons-by-voice/id6751764275)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.00 | one-time |


## Frequently asked questions

### Is Eighty One free?

Eighty One is free to download, with no in-app purchases.

### Is Math Lessons by Voice free?

Math Lessons by Voice is free to download, with in-app purchases available.

### Do Eighty One or Math Lessons by Voice have ads?

Neither Eighty One nor Math Lessons by Voice shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*